Refrigerating apparatus



July 1, 1930. -F. w. ANDREWS [1,763,559

' RE RIGEimTING APPARATUS Y Filed April 28, 1%?

2o ing cabinet provided with a ratus. It is particularly, tho not exclusively, adapted to refrigerating cab nets of the vation; and v Fig. 3 is a side elevation of the cooling.

Patented July 1 1930 UNITED-stares EN'If. omes FRANK W. ANDREWS, OF DAYTON, OHIO, ASSIG-NOIR, BY IlVI-ZEISINIEI ASSIGNMENTS, TO

" FRIGIDAIRE CORPORATION, ACORPQRATION OF DELAWARE nnu'nrdnnarme Arr Application filed A rnas,

This inventionrelates to cooling devices, termed units or coils for refrigerat ng appahousehold type." 1

It is among the objects of the invent on to provide an improved cooling unitwhich will freeze 'ice quickly and at the same time effectively cool circulating air for refrigerating a cabinet and to provide a cooling un1t which is simple and inexpensive to manufacture and install. v

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings, wherein a preferred form of embodiment of the present invention is clearly shown.

In the drawings; Fig. 1 is a front elevation of a refrigeratcooling coil according to the .present invention; i

Fig. 2 is an'enlarged, section of a portion of a cabinet showing the cooling coil in elecoil removed from the cabinet. f

' In Fig. 1, l0 designates' a refrigerating cabinet which may have a cooling compart ment 11, one or more storage compartments 12, doors 13 and a machine compartment 14.

The cooling compartment may be conveniently provided by', an L-shaped partition 15 placed in the corner of the cabinet and .pro-' vided with air circulating openings 16- and According to the present invention make the cooling unit or coil of a-single continua ous' piece of pipe or tubing 20 which is wound into a series"of coils,21.' Each coil consists of a plurality of loops which may be made by winding thepipe into the general shape .of a comb, or preferably as shown in the drawings, by "winding the pipeinto a serpentine form. .A series ofthese serpentine coils 21 is' formed and, as shown in Fig. 3, they are placed in parallel planes 7 preferably contiguous to each other. The

coils in each plane are wound with. their loops reversed with'respect to the coils in 'nient 13 as is well known in the art.

ros

1927. seriain 187,351.

the adjacent planes 'asshown in Fig. 2, so

that the corresponding loops of all of the Coilsco-operate to form enclosuresfor ice making receptacles 30. I

Preferably sleeves 31 are placed within the enclosures thus formed and are secured inintimate thermal contact with the coils,

for example, b'ysoldering. These sleeves are of metal of good thermal conductivity such as copper and provide shields 'to prevent moisture dripping from the coils into the ice-making receptacles as 'well as means for conducting heat from the receptacles to the coils. The loops of the coils extend laterally beyond the sleeves 31 and form cooling means for currents of air circulating over -the cooling unit. In the embodiment: shown, the unit is supported in the cabinet jby straps 32 secured to the top of the cabinet and attached to the loops by clamps The unit is placed in the cabinet with its circulating thru the cabinet and entering .the cooling compartment thru this opening top slightly below opening, 16 so that air means for-cooling the air. A'bafile-35 may be provided above the opening .17 to prevent moisture from dripping thru'the opening. This moisture may be removed from the cooling compartment by a. drain 36.

Thecooling unit may be supplied with any refrigerating medium, such as cold brine, which may be"cir'culatedby'any suitable apparatus, but I prefer to evaporate Liquid refrigerant within the coils. Such liquid refrigerant may besupplied thru a conduit 40 to an expansion. valve42 which regulates the flow of liquid to the coils. The refrigerant .-evaporated in. the coils is removed thru the suction pi e 43. Any-suitable apparatus may be use for this purpose such asfthe usual motor driven compressor and condenser (not shown}. which for convenience may be placed in the machine compart- It will beseen that I have provided a cooling unit which has means for elfectively cooling circulating air and which at the same time provides aplurality of completeenclosures' for-'ice-making receptacles and therefore has a large ice-making capacity.

. lhe arrangement described is particularly effective in constructing a cooling unit for alarge number of ice-making-pans, since refrigerant will circulate between and around each of the pans irrespective of their number. p

While the form ofembodiment of the present invention as herein disclosed, constitutes a preferred form, it is-to be understood that other forms might be adopted, all comin within the scope of the claims which fol ow. I

What is claimed is as follows:

1. cooling unit for refrigerating =ap aratus compris ng a single continuous con uit formed into a plurality of planar coils, each coil consisting of a plurality oftloops, the.

formed into ap lurality of planar coils,

coils being disposed in, parallel planes, and

the loops of each coils-being reversed with resp'e'ct to the loops of the adjacent coils to form a plurality of enclosures for ice-mak-'.

ing receptacles.

A coolingnnit for refrigerating apparatus comprisin a single continuous conduiltla eac of a plurahty'of loops, the

coil consistin coils being disposed inx parallel planes and contiguous to each other, and the loops of each coil being reversed with respectto the loops of the adjacent coils tojorma plurality of enclosures for ice-making recep-' tac es;

" coils being disposed in parallel planes and respect to theloops of the adjacent coils to the loops of each -coilcb'eing reversed with formja plurality of enclosures for ice-making receptacles.

4. A cooling ratus comprising a single continuous con uit .formed into a series of planar coils, each c011 cons sting of a plurality of loops, the coils being disposed in parallel planes and 3. A cooling unit for refrigerating apparatus comprising a single continuous con uit formed into a series of serpentine coils, the

signature; 3

' FRANK W. ANDREWS.

unit for refrigerating ap a;

the loops of each coil being reversed with respect to the loops of the adjacent coil to form a plurality of enclosures for ice-mak I ing receptacles, compartments for ice-making receptacles within said enclosures, the

loops of the coils extending laterally beyond the compartments to cool circulating air.

5. A cooling unit for refrigerating appaformedinto a series of planar coils, each co l conslstin of a pluralit of loops, the coils being disposed in para el planes -andratus comprising a single continuous conduit the loops ofeach coil being reversed with respect to the loops of the adjacent coils 

